Because E-Line services implement point-to-point Ethernet virtual connections (EVC), if both UNIs associated with point-to-point EVC implement an EPL service, any further connectivity requirements will require additional UNIs at one or both ends. This service is literally point-to-point.

Because there is only one EVC per UNI, the EVC can be invisible to the customer (e.g., the customer will not see an 802.1pVLAN tag).